About Us

Our Mission

Create and support one-to-one mentoring relationships that ignite the power and promise of youth.

Our Vision

All youth achieve their full potential.

Our People

We are headquartered in San Francisco, with local offices in Oakland, Milpitas, and American Canyon. In addition to maintaining the dedicated services of more than a thousand matches, Big Brothers Big Sisters of the Bay Area employs over two dozen staff members who support matches in all nine counties.

Executive Director

Carissa Tonner

Carissa joined Big Brothers Big Sisters of the Bay Area in 2014 soon after moving to San Francisco from the Midwest, working as the VP of Finance and Operations before becoming Executive Director in 2020. Her areas of expertise include operations management, process improvement, and financial oversight, and she believes that well-run operations are essential in enabling nonprofit teams to focus on the critical mission work. Before relocating to California, Carissa worked as Administrative Director for The Conservation Center, the nation’s largest privately-held art conservation laboratory, and for the corporate division of renowned jewelry retailer Lester Lampert, where she managed client services and fulfillment. Carissa’s educational background includes a Master of Business Administration degree and a Bachelor of Arts in Art History from Roosevelt University. When she isn’t poring over spreadsheets, you’re likely to find Carissa wandering around a museum or enjoying some french fries.



VP of Programs

Anthony Spivey



VP of Data & Systems Administration

Rick Ohren

Rick has been with Big Brothers Big Sisters of the Bay Area since 2008, starting as Data Communications Specialist before becoming Director of Operations in 2013. He was named Vice President of Operations in 2014 and Vice President of Data and Systems Administration in 2017. Prior to his arrival at BBBSBA, Rick worked for over 17 years in retail management, where he developed his penchant for problem-solving and system management, as well has his desire to help others and serve the public.

Rick’s educational background includes a bachelor of science degree in Technical Journalism from Oregon State University. He and his wife live in Berkeley.



Dir of Individual Giving

Blake Washington


Phone:(415) 503-4037

Director of Communications

Charlotte Williams

Charlotte joined Big Brothers Big Sisters of the Bay Area in 2019. She brings a wealth of experience in domestic and international for and non-profit communications, management and administration.  Prior to joining Big Brothers Big Sisters, Charlotte worked as the Director of Communications for the historic Allen Temple Baptist Church of Oakland, a freelance Communications Consultant and as Country Manager for Sephora Canada. Charlotte’s education includes Bachelors and Master’s degrees from Trinity University and Fuller Theological Seminary. In her free time, Charlotte loves to travel internationally, surf, read and spend time with family and friends.

Phone:(415) 322-5103


Dir, Institutional Giving

Laksmi Lagares

Laksmi’s professional experience focuses on Corporate Social Responsibility, Community Engagement, Government Affairs, and Fund Development. As a leader, uniquely skilled at generating a triple bottom line — benefiting community, the private sector, and non profit/philanthropic organizations — Laksmi expertly leverages her role at Big Brothers Big Sisters to support the mission and goals of the organization. When she’s not working hard on grants and partnerships she can be found volunteering in the community and being a “dance mom.”



Regional Director

Raven Sanchez


Phone :415-503-4351

Special Events Manager

Stacey Mohr



Regional Director

Stacie Schlenker



Gina Rae Garibaldi

Gina Rae Garibaldi

Program Supervisor (Oakland)


Marynoelyn Jacob-Oviatt

Marynoelyn Jacob-Oviatt

Program Supervisor (Milpitas)


Tania Rivera Calderón

Tania Rivera Calderón

Program Supervisor (American Canyon)


Andrea Thornton

Andrea Thornton

Program Partnership Coordinator


Anna Carrizales

Anna Carrizales

Enrollment & Match Specialist (Milpitas)


Arthelle Porter Burns

Arthelle Porter Burns

Match Support Specialist (American Canyon)


Brandi Hamilton

Brandi Hamilton

Match Support Specialist (San Francisco)


Camila Nunez

Camila Nunez

Match Support Specialist (Milpitas)

(408) 655-0228

Cristal Nuñez

Cristal Nuñez

Enrollment & Match Specialist (American Canyon)


Elizabeth Garcia-Navarro

Elizabeth Garcia-Navarro

Match Support Specialist (American Canyon)


Ginger Luna

Ginger Luna

Enrollment & Match Specialist (Oakland)


Hector Amaya

Hector Amaya

Match Support Specialist (Oakland)

(510) 846-8431

Melissa Garcia

Melissa Garcia

Customer Relations Specialist

(415) 503-4034

Vanessa Dominguez

Vanessa Dominguez

Match Support Specialist (San Francisco)


Board of Directors

Mani Aliabadi, Google
CJ Babb, Pando
Lawrence Bancroft, Bivium Capital Partners
Andrew Barnette, East West Bank
Mike Campbell, BDO
Alex Coassin, PwC
Martha Ehmann Conte
Michael D’Onofrio, Conga
Paul Dalzell, Bessemer Trust
Tom DeJonghe, Retired, Chevron Corporation
Katie Dignan, Kairos Power

Christine Flores, Pinterest
Chris Fragakis, Wells Fargo Securities
Sarah Franklin, Salesforce
Curtis Gardner, ARA Newmark
Alex Grebenschikov, AppDynamics
Paul Greenall, Prophet
Majd Khleif, Syserco, Inc.
Jay Kim, Major, Lindsey & Africa
Jeff Kragel, Berstein Global Wealth Management
Todd Lachman, Sovos Brands
Dianne Lamendola, Intel

Chris McClure, Lincoln Financial Advisors
Paul Owens, Reed & Greenough
Priya Rajan, Silicon Valley Bank
Gina Sheibley, Salesforce
Tanaz Sowdagar, Akamai Technologies
Seth Tator, Salesforce
Charles Taylor
Aaron Vermut
Michelle Wellington, Quotient Technology Inc.
Dan Wire, FireEye Inc

Community Boards

Community Partners with Big Brothers Big Sisters of the Bay Area provide the opportunity for employees or members of your organization to volunteer in the community. Our volunteer programs also build teamwork and employee engagement.

Community Boards strengthen ties in local areas and help raise funds and awareness through events that attract a diverse network throughout the Bay Area.

Join the fun, all while helping support mentoring for Bay Area kids!

Junior Board

The Junior Board of Big Brothers Big Sisters of the Bay Area is a group of young Bay Area professionals dedicated to raising funds and awareness to support our mission. Members commit to meeting a committee fundraising goal, attending one meeting each month and participating in the planning and promotion of our signature events. Connect and stay up to date with the Junior Board via Facebook or email for more info about joining the board or the next event.

South Bay Advisory Council

The South Bay Advisory Council engages the Silicon Valley community, meeting monthly to organize activities for South Bay Littles and Bigs, bolstering recruiting efforts, and conducting fundraising events that provide vital support for our agency’s mission. Membership entails a one-year commitment to attend meetings and events. To get involved, contact us at sbac.membership@bbbsba.org.

East Bay Advisory Council

This group of volunteers focuses on recruiting men of color so that we can better support the specific needs of our waiting Littles in the region. ​The Council helps to identify resources necessary to better serve the community, including securing meeting space,​ dedicated fundraising support, and frequent East Bay community feedback. To get involved, contact us at ebac.membership@bbbsba.org.

Our History

For more than 100 years, Big Brothers Big Sisters has operated under the belief that inherent in every child is the ability to succeed and thrive in life. As the nation’s largest donor and volunteer supported mentoring network, Big Brothers Big Sisters makes and monitors meaningful matches between adult volunteers (“Bigs”) and children (“Littles”), ages 6 – 18, in communities across the country to develop positive relationships that have a direct and lasting effect.

Bay Area Wide

Big Brothers Big Sisters of the Bay Area has been providing Bay Area kids with professionally supported one-to-one mentoring relationships since 1958, gradually growing to represent all of the Bay Area regions, at large.

With the first major Bay Area merger in 2006, three separate Big Brother Big Sister organizations — San Francisco & Peninsula, East Bay, and Santa Clara County — integrated into Big Brothers Big Sisters of the Bay Area to more efficiently serve the community and meet the increasing demand for services.

In 2017, we merged with Big Brothers Big Sisters of the North Bay, which had been serving children in Marin, Sonoma, Napa and Solano Counties since 1970, to further streamline resources. Effectively reaching the entire Greater Bay Area as a unified organization, we now serve children from nine counties in the Greater Bay Area: Alameda, Contra Costa, Marin, Napa, Santa Clara, San Francisco, San Mateo, Solano, and Sonoma.

Financial Statements

Your financial support helps kids to realize their potential, one relationship at a time.

The documents below provide detail of our carefully managed financial status. Every local Big Brothers Big Sisters affiliate is an independent 501(c)(3) non-profit organization with its own IRS Form 990 and audited financial statements.


Make a Big Difference in the Lives of Bay Area Kids

Big Brothers Big Sisters of the Bay Area is an exciting, fast growing non-profit with heart-felt goals. We’re committed to building a great staff: we offer a good benefits, competitive wages, and of course, a job that matters.

Current Open Positions